Portions of the following information were taken from Florida Geological Survey Bulletin 66.

Falmouth Spring is 10 miles northwest of Live Oak. From the intersection of I-10 and US 90 northwest of Live Oak, travel about 2.9 miles northwest on US 90. Enter the Falmouth Spring Recreation Area at the SRWMD sign on the south (left) side of the road. The spring is west of the parking area and is accessed by an interpretive hiking path.

Description – Falmouth Spring is a karst window. At the head of the karst window, the pool measures 87 ft north to south and 81 ft east to west. The depth is 39 ft. The water discharges from a conical depression. The bottom is sand and limestone. Water is fairly clear, greenish with tiny suspended algal particles. The bottom and sides are thickly covered with dark green filamentous algae. There was no visible boil during the October 2001 visit. Limestone is exposed along sides. High sand banks rise steeply along the karst window to 25 to 30 ft above water level. Surrounding high ground has mixed hardwood and pine forest. The run flows 450 ft northeast until disappearing into a siphon. The east side of the karst window has a wooden boardwalk leading down to spring and a foot path along the run. Rosenau et al. (1977) report an underwater cave in this karst window.